- ICH GCP
- Registre américain des essais cliniques
- Essai clinique NCT03841383
Association Between Coronary Flow Reserve and BH4 Levels in High CV Risk
Study to Investigate the Association Between Coronary Flow Reserve and BH4 Levels in Patients With High Cardiovascular Risk
Aperçu de l'étude
Statut
Les conditions
Intervention / Traitement
Description détaillée
Primary parameter :
relationship between coronary flow reserve (CFR) and platelet/plasma BH2 and BH4 levels in patients with hypertension and concomitant cardiovascular risk factors.
Secondary parameter:
Levels of cGMP in platelets.
4. Study design
Three parallel groups of patients (n=15 per group):
- Group 1 with normal coronary flow reserve (CFR ≥2.5)
Group 2 with reduced coronary flow reserve (CFR≤2.0)
o Group 3 control subjects (without a high risk profile according to ESC score chart http://www.heartscore.org. ) matched for age (between 40 and 80 years of age)
- and gender. 1/3 enrolled patients must be diabetic (Type2 diabetes)
Type d'étude
Inscription (Réel)
Contacts et emplacements
Lieux d'étude
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Bergamo, Italie, 24127
- Asst Papa Giovanni Xxiii
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Milan, Italie, 20132
- IRCCS Ospedale San Raffaele
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Critères de participation
Critère d'éligibilité
Âges éligibles pour étudier
Accepte les volontaires sains
Sexes éligibles pour l'étude
Méthode d'échantillonnage
Population étudiée
La description
Inclusion Criteria:
o men and women (females of childbearing potential must be using highly effective contraceptive precautions such as implants, injectables, combined oral contraceptives, intrauterine devices, sexual abstinence or vasectomised partner)
- Females of childbearing potential or within two years from the menopause must have a negative urine pregnancy test
- between 40 and 80 years of age
- documented history of hypertension
- smokers/non smokers R
- type 2 diabetes R
- Moderate to severe kidney disease (GFR >30 and <60 ml/min/1.73m2 (estimated MDRD) R
- Hypercholesterolemia R
- Receiving an optimal standard antihypertensive treatment for at least 6 months, stable for at least 15 days
- All other concomitant treatments stabilized at least for the preceding 15 days
- Able to give written informed consent
Exclusion Criteria:
o Females of childbearing potential not using highly effective contraceptive precautions
- Patients with obstructive (>50% diameter reduction) CAD on the LAD (based on invasive angiography or coronary CTA) or with evidence of previous myocardial infarction or history of revascularization in the LAD territory.
- CAD on the RCA or CX with diameter reduction > 50% (based on invasive angiography or coronary CTA) , either native or revascularized (stent)
- Patients with infectious disease and/or chronic inflammatory diseases
- Epicardial coronary arteries spasm
- Patients with severe valve disease and/or significant left ventricular wall motion abnormalities
- Patients under treatment with non-selective beta blockers including propranolol, nadolol, pindolol, labetalol, penbutolol, sotalol, carvedilol, and timolol.
- Contraindications to dipyridamole infusion: asthma, bronchospasm, previous < 24 hours ingestion of phylline derivatives (tea, coffee, cola, xanthines and chocolate) sick sinus syndrome, advanced AV block (second and third degree), systolic blood pressure < 90 mmHg, cerebral ischemia, severe sinus bradycardia (heart rate <40/min), use of dipyridamole during the last 24 h, severe atherosclerotic lesions of extracranial artery >75%.
- Acute treatment or treatment for acute diseases
- Patients receiving steroidal anti-inflammatory drugs, dietary supplements of folic acid, or antioxidant vitamins.
- Any condition that may prevent the pt to give informed consent , enter the study or bias the results.
- Participating into other studies
Plan d'étude
Comment l'étude est-elle conçue ?
Détails de conception
Cohortes et interventions
Groupe / Cohorte |
Intervention / Traitement |
|---|---|
|
Contrôles sains
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Echo stress dipyridamole
Autres noms:
|
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Patients hypertendus
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Echo stress dipyridamole
Autres noms:
|
Que mesure l'étude ?
Principaux critères de jugement
Mesure des résultats |
Description de la mesure |
Délai |
|---|---|---|
|
BH2 and BH4 levels (ng/ml) in plasma and platelets
Délai: 1 week
|
Blood samples will be withdrawn and subsequently analyzed to assess biopterins BH4 and BH2 ng/mL concentration in plasma and platelets Each will be determined separately from the same sample, by high-performance liquid chromatography followed by serial electrochemical and fluorescent detection.
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1 week
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Coronary Flow Reserve (CFR) Trans Thoracic Doppler Echocardiography
Délai: 1 week
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Measurement of coronary flow reserve of the left anterior descending coronary artery will be carried out with transthoracic Doppler Echocardiography (TDE) and dipyridamole stress.
CFR will be calculated as the ratio between stress and resting flow velocity (cm/sec)
|
1 week
|
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Relationship between coronary flow reserve (CFR) and platelet/plasma BH2 and BH4 levels.
Délai: 1 week
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Simple regression analysis or logistic regression will be used to test the relationship between CFR and biopterins values in plasma and platelets.
|
1 week
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Mesures de résultats secondaires
Mesure des résultats |
Description de la mesure |
Délai |
|---|---|---|
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Levels of cGMP in platelets
Délai: 1 week
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Comparison of levels of cGMP in platelets among normals, patients with normal CFR and patients with reduced CFR
|
1 week
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Collaborateurs et enquêteurs
Parrainer
Collaborateurs
Les enquêteurs
- Chercheur principal: Paolo G Camici, MD, IRCCS Ospedale San Raffaele
Dates d'enregistrement des études
Dates principales de l'étude
Début de l'étude (Réel)
Achèvement primaire (Réel)
Achèvement de l'étude (Réel)
Dates d'inscription aux études
Première soumission
Première soumission répondant aux critères de contrôle qualité
Première publication (Réel)
Mises à jour des dossiers d'étude
Dernière mise à jour publiée (Réel)
Dernière mise à jour soumise répondant aux critères de contrôle qualité
Dernière vérification
Plus d'information
Termes liés à cette étude
Termes MeSH pertinents supplémentaires
Autres numéros d'identification d'étude
- CFRBH4_IT1
Plan pour les données individuelles des participants (IPD)
Prévoyez-vous de partager les données individuelles des participants (DPI) ?
Informations sur les médicaments et les dispositifs, documents d'étude
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